枯草芽孢杆菌缓解桃苗盐胁迫的效果研究

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中图法分类号：S662.1 文献标识码：A 文章编号：1000-2324（2025）03-0418-09

Abstract：ToexploretheeffectofBacilussubtilisonsaltresistanceofpeach，usingPrunusdavidianaseedlingsas test materials，thisstudyestablishes three treatments（CK：clear water;T1：salt stress；T2：Bacillussubtilis+saltstress），to investigatetheefectsofsalt stressonthe growth，photosyntheticparametersandantioxidant enzymeactivitiesof peach seedlings.Theresults show that compared with CK，the plant height，stem diameter，maximum photosynthetic effciency， stomatalonductance，F/F，AD，chlorophylla，chlorophylladcarotenoidcontentofandTigniicantlydclie. Andthedecreaseoftheabove indexesofT2isnotassignificantasthatofT1.Inaddition，intercellularcarbondioxide concentration，relativeconductivitymalondialdehydecontent，superoxide anioncontentandhydrogen peroxidecontentin leaves mprove significantly.T2 increases too，butnotassignificantasT1.Furthermore，CAT，PODandSODactivityofT2 risegreatly.T1alsoincreases，butlesssignificantcomparedtoT2.Inconclusion，saltstress inhibitspeachseedlinggrowth， whilethe appication of Bacillussubtisin T2group significantlyaleviates salt stress damagetothe growth and development of peach seedlings，indicating that Bacillus subtilis can improve the salt resistance ofpeach seedlings.

Keywords：Peach;salt stress;Bacillus subtilis;physiological indicators

山桃（Prunusdavidiana（Carriere）Franch.），蔷薇科，桃属，多年生乔木，又名山毛桃、花桃、野桃。（剩余12881字）